There are a lot of concrete and painstaking works to be done for importing distributed interactive simulation (DIS) technology from military field to civil navigational simulation system. In navigational virtual environment, how to simulate various waves in real-time, how to simulate ship's wakes and the phenomenon of nature such as snow, rain and fog in real-time are very pivotal factors to determine whether a navigational simulation virtual environment is successful or not. In this dissertation, the autho...